Paper machine



J. OHARA.

PAPE MACHINE. APPLICATION FILED OCT. 3. ISIS.

EIAJS,

Patented June 20, M922.

:JM/vanto@ 351g $411, M, wouw/m UNHE EAMES OHARA, 0l? LEBANON, OREGON.

PAPER MACHINE.

Specification of Letters Patent. y Pgtienfd June 20,

Application filed ctober 3, 1919. Serial No. 328,131.

Be it known that I, Janus OI-Iana, a citizen o1" the United States, andresiding at Lebanon, Iiinn County, State of CregOn, have inventedcertain new and useful Improvements in Paper Machines, of which thefollowing is a specification.

rIhis invention relates to paper making machines and has particularreference to the means tor keeping the wire fabric, commonly called thewire, under tension or stress without subjecting)` it to such bendingstrains as will injure the fabric and cause early breakage. In devicesci this kind, such as the Fourdrinier paper machine, the wire passesover the table ci' the machine and around the breast roll at the end andback under the table, but iu order to stretch and keep the wire undertension, it is made to pass over supporting rollers and then under whatis called a stretch roll, which is vertically adjustable to apply thenecessary tension. This stretch roll serves the purpose of properlystretchingthe wire, but it causes the wire to bend back and forth in itstravel under the table and this results in crystallizing the wire,causing early breakage. According to my invention I do away with thisstretch roll and the consequent bending ot the wire, thus prolonging itslife, but at the same time I provide means for regulating the tension onthe wire. Ace cording` tc my invention I use the breast roll itself asthe means for stretching and tightening the wire. The novel featuresoit' my invention will be apparent 'from the followine, descriptiontaken in connection with the drawings. In the drawings,

Fig. 1 is a plan view of a portion or" a paper making machine showingthe breast roll and a part of the table; and

Fig. 2 is a side elevation of the same thing.

In the drawings 10 represents a part of the well known frame of thepaper machine which carries the table at its top made up or rollers, 11,as is usual. The wire 12 passes over the top or the table and thenaround the breast roll 13, and back underneath the table passing overroller 28, which merely supports it and holds it in straight horizontalposition. In the form which I have shown the breast roll is not mountedin the main frame of the machine, but on the bracket 14, secured to theiframe by bolts 15. It will be understood that there is one of thesebrackets at each side of the machine at the opposite ends of the breastroll, and each has in its top horizontal portion a grooved trackway 16in which slides a bearing block 17 which is made to properly t in thegroove. 'Ihere is a slot 18 through the horizontal portion of thebracket through which projects a screw threaded part 19 extendingdownwardly from the bearing block 17 and a nut 2O may be placed on theprojecting screw threaded end to clamp the bearing block in desiredposition. The bearing block 17 has a vertical slot 21 in it, the bottomor which is rounded to form a bearing for the shaft 22 ot' the breastroll. rIhe bracket 14 'has an upwardly extending portion 23 having abearing` 24 for the adjusting rod 25pmvided at its outer end with theturning handle or wheel 26. The adjusting rod 25 is provided with screwthreads at its inner end and they engage a screw threaded socket in theprojection 27 on the bearing block 17. The adjusting rod 25 is mountedto turn in the bearing 24 and to be held thereby against. longitudinalmovement because of the projecting shoulders on each side of the part23, and it will be understood, therefore, that when this adjusting rodis turned, the screw threaded engagement with the bearing block willmove it longitudinally of the trackway 16. It will be. understood thatthe operating mechanism is the same on both sides of the machine, andthus the breast roll may be moved to any adjusted positionlongitudinally to stretch or tighten the wire 'to the desired extent. Iwish it understood, however, that my invention is not limited to theparticular means for adjusting the breast roll, but the essentialfeature of my invention is the use of the breast roll as a means oftightening the wire thus doing away with the stretch roll and consequentbending of the wire.

Having thus described the invention what I claim as new and desire to besecured by Letters Patent is:

1. In a paper making machine the combination with a frame, of a tablesupported thereby, a wire passing over said table, a breast rollsupported by said trame at the end of the table around which said wirepasses and means :t'or adjustably moving said breast roll longitudinallyof the machine to different adjusted positions as the sole means tostretch or put tension on said wire.

2. In a paper making machine the combination with a frame, of a tablesupported thereby, a wire passing over said table, a breast rollsupported by said `frame at the end of the table around which said wirepasses, means for adjustably moving said breast roll longitudinally ofthe machine to diiierent adjusted positions as the sole Y means tostretch or put tension on said wire,

and rollers below said table to support said wire leaving the lower partof the breast roll in a straight line without bends.

3. In a paper making machine the combination with a frame, 'of a tablesupported thereby, a wire passing` over said table, a breast roll at theend of the table around which said wire passes, bearings for said breastroll movable longitudinally of the machine as the sole means to stretchor put tension on Said wire passing around said roll and means includingan accessible hand controlled part for adjustably moving said bearingsto secure the desired tension.

4. In a paper making machine the coinbination with a frame, of a tablesupported thereby, in a single plane a wire passing over said table, abreast roll at the end of the table around which said wire passes,bearings for said breast roll movable longitudinally of the machine asthe sole means to stretch or put tension on both the upper and lowerportions, said wire passing around said roll manually operable, meansfor adjustably moving, said bearings to secure the desired tension, andmeans below said table to support said wire leaving the bottom of saidroll in a straight line without bends.

5. In a paper making machine the com` ture. Y

JAMES OHARA.

